pseudoaneurysm

/pseu·do·an·eu·rysm/ (-an´ūr-izm) false aneurysm; dilatation or tortuosity of a vessel, giving the appearance of an aneurysm.

pseudoaneurysm

[-an′yəriz′əm]

1 a dilation of an artery caused by damage to one or more layers of the artery as a result of arterial trauma or rupture of a true aneurysm.

2 a tortuosity of a blood vessel or cavity resulting from a herniated infarction. Also called pulsatile hematoma.

pseudoaneurysm

The preferred term for a false aneurysm in which the saccular dilation (“aneurysm”) does not involve all of the vessel wall layers.

Pseudoaneurysm should not be confused with phantom aneurysm (also known as aortismus abdominalis), a near-extinct term for the clinical misinterpretation of the (normal) aortic pulse as a sign of an abdominal aortic aneurysm, an error usually borne of inexperience.

pseudoaneurysm

false an·eu·rysm

1. Pulsating, encapsulated hematoma in communication with the lumen of a ruptured vessel;

2. Ventricular pseudoaneurysm, a cardiac rupture contained and loculated by pericardium, which forms its external wall.

3. An aneurysm with walls that consist of adventitia, periarterial fibrous tissue, and hematoma.

pseudoaneurysm

false aneurysm; differs from a true aneurysm in that its wall does not contain the components of an artery, but consists of fibrous tissue, which usually continues to enlarge, creating a pulsating hematoma.

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